【进阶实战】拍卖行关注列表：拍品关注的提醒封装

local watchList = {}
local function addWatch(actorName, keyword, maxPrice)
    local actor = getplayerbyname(actorName)
    local key = actorName .. "|" .. keyword
    watchList[key] = { max = maxPrice, by = actorName }
    sendmsg(actor, 1, "已关注 " .. keyword .. "，上限 " .. maxPrice .. " 金币。")
end
local function onNewListing(itemId, price)
    for key, w in pairs(watchList) do
        if string.find(itemId, key:match("|(.+)$"), 1, true)
            and price <= w.max then
            local by = key:match("^(.+)|")
            local actor = getplayerbyname(by)
            if actor then
                sendmsg(actor, 1, "关注的 " .. itemId ..
                    " 已上架，价格 " .. price .. "。")
            end
        end
    end
end

local function listWatches(actorName)
    local actor = getplayerbyname(actorName)
    for key, w in pairs(watchList) do
        if string.find(key, "^" .. actorName .. "|") then
            sendmsg(actor, 1, "关注：" .. key:match("|(.+)$") ..
                " 上限 " .. w.max)
        end
    end
end